Found it. Looks like Giuliani was the front-runner with McCain around 4th place at 10%.
Rasmussen Reports Poll Oct 19–22, 2007 Rudy Giuliani 24%, Fred Thompson 19%, Mitt Romney 16%, John McCain 12%, Mike Huckabee 8%
Rasmussen Reports Poll Oct 14–17, 2007 Rudy Giuliani 27%, Fred Thompson 21%, Mitt Romney 14%, John McCain 10%, Mike Huckabee 7%
Gallup Poll Oct 12–14, 2007 Rudy Giuliani 32%, Fred Thompson 18%, John McCain 14%, Mitt Romney 10%, Mike Huckabee 6%, Ron Paul 5%, Sam Brownback 2%, Tom Tancredo 2%, Duncan Hunter 1%, None/No opinion 9%
Rasmussen Reports Poll Oct 11–14, 2007 Rudy Giuliani 30%, Fred Thompson 22%, Mitt Romney 14%, John McCain 8%, Mike Huckabee 6%
Rasmussen Reports Poll Oct 4–7, 2007 Fred Thompson 24%, Rudy Giuliani 23%, Mitt Romney 14%, John McCain 9%, Mike Huckabee 5%
Rasmussen Reports Poll Oct 2–5, 2007 Fred Thompson 21%, Rudy Giuliani 19%, Mitt Romney 16%, John McCain 11%, Mike Huckabee 4%